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基于ITS序列探讨荻属及其近缘植物的系统发育关系
引用本文:陈少风,董穗穗,吴伟,施苏华,周朴华.基于ITS序列探讨荻属及其近缘植物的系统发育关系[J].武汉植物学研究,2007,25(3):239-244.
作者姓名:陈少风  董穗穗  吴伟  施苏华  周朴华
作者单位:1. 湖南农业大学生物科学技术学院,长沙,410128;南昌大学生命科学学院,南昌,330031
2. 中山大学生命科学学院,广州,510275
3. 湖南农业大学生物科学技术学院,长沙,410128
摘    要:荻属是禾本科的一个小属,其分类地位存在争议。通过测定和从Gen Bank中提取荻属Triarrhena及其近缘植物的ITS序列,以芦苇Phragmites australis为外类群,采用MP(maximum parsimony)和NJ(neighbor-joining)分析方法进行了系统发育分析,这两种方法得到的系统发育树基本相同。荻属和芒属Miscauthus的种类形成一个单系类群;河八王Narenga porphyrocoma与芒属和荻属的植物聚在一起并构成姐妹群;白茅Imperata cylindrica与斑茅Saccharum arundinaceum聚成一小支并构成姐妹群,白茅与荻属的关系较远;荻属植物归并到芒属更为合理,不支持将荻属置入白茅属或另立一属的观点。斑茅与白茅、河八王及蔗茅Erianthus fulvus系统发育关系较近,而与滇蔗茅E.rockii及甘蔗属的竹蔗Saccharum sinense、甘蔗S.officinarum、细秆甘蔗S.barberi和甜根子草S.spontaneum的关系较远。甘蔗属、河八王属及蔗茅属关系复杂,还需要进一步研究。

关 键 词:荻属  系统发育
文章编号:1000-470X(2007)03-0239-06
修稿时间:2006-12-042007-01-16

Phylogenetics of Triarrhena and Related Genera Based on ITS Sequence Data
CHEN Shao-Feng,DONG Sui-Sui,WU Wei,SHI Su-Hua,ZHOU Pu-Hua.Phylogenetics of Triarrhena and Related Genera Based on ITS Sequence Data[J].Journal of Wuhan Botanical Research,2007,25(3):239-244.
Authors:CHEN Shao-Feng  DONG Sui-Sui  WU Wei  SHI Su-Hua  ZHOU Pu-Hua
Institution:1. School of Bioscience and Technology, Hunan Agricultural University, Changsha 410128, China; 2. School of life Sciences, Zhongshan University, Guangzhou 510275, China; 3. School of Life Sciences, Nanchang University, Nanchang 330031, China
Abstract:Triarrhena is a small-sized gunus of Gramineae with only two species,which occurs in eastern Asia,particularly in China,but its taxonomic treatment has been a controversial matter.It was treated as an independent gunus,or a species under Miscauthus or Imperata.This study is to assess the phylogeny of Triarrhena and its related genera in Saccharinae(Gramineae) based on internal transcribed spacer(ITS) and the 5.8s coding region of the nuclear ribosomal DNA.Maximum parsimony(MP) and neighbor-joining(NJ) methods were employed to analyze the data sets with Phragmites australis as outgroup.The phylogenetic trees based on the data set show that the genus Miscauthus(including Triarrhena) formed a monophyletic group.Narenga porphyrocoma was strongly supported to be the sister group of a subclade comprising Miscauthus and Triarrhena.Imperata cylindrica and Saccharum arundinaceum were sister group and formed a subclade,indicating their close affinity.The present authors suggest that Triarrhena should be merged with Miscanthus.The results of phylogenetic analysis also indicate that Saccharum arundinaceum has a closed relationship with Imperata,followed by Narenga and Miscauthus.However it is the most distant to the other species of Saccharum.Since the genera of Saccharum,Narenga and Erianthus are shown to be polyphyletic,further studies on their phylogenetic relationships are still needed.
Keywords:ITS
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